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How many decibels in a tv?
110
How loud is 37db?
A refrigerator humming is 40db
What is 1 percent of 40db attenuation?
20 dB
How many times louder is an 80 dB sound compared to a 40 dB sound?
1000 times louder. Every 10 decibel, the intensity increases by a factor of 10.1000 times louder. Every 10 decibel, the intensity increases by a factor of 10.1000 times louder. Every 10 decibel, the intensity increases by a factor of 10.1000 times louder. Every 10 decibel, the intensity increases by a factor of 10.
What happens when decibel levels go down?
The sound becomes harder to hear. Unless you are above the threshold of pain in which case I guess the sound becomes easier to hear. The decibel system was designed so that the thresold of human hearing is just about at 0 dB and the threshold of pain is at about 135dB0. Where the power doubles for every 3 dB points. Hence it is a logarithmic scale. A 20dD sound is not half as loud as a 40dB sound but roughly 100 times quiter.
Is there more energy in a 30 dB or 40dB sound wave?
40 dB has ten times the power of 30 dB. 50 dB has another ten times as much power.
What is the future tense of hear?
The future tense of hear is will hear.
How far away can you hear a motorway?
For many vehicles, the road contact noise will be larger than the noise from engine or exhaust. Even inside the vehicle, the noise level will vary from 70db or so for a noisy car, down to 40dB for a quality car. Outside the car, the sound level should not be greater than 80 dB at say 3m. It varies widely with type of engine, type of car, and speed.
What is the lowest decibel value based on?
The decibel unit was first used to measure the loss in telegraphic circuits, and was named by the engineers at Bell Laboratories, in honour of Alexander Graham Bell. A 1dB loss was the smallest noticeable decrease in loudness of the signal. There is no lowest decibel level. Since the dB is a ratio, arbitrarily small signals may still have attached numbers such as -40dB. Have a crack at decibel in a good encyclopedia. The decibel is not an SI unit, though it is given definition by the appropriate International Electrotechnical Commissions. Historically, in audiometry, 0dB was defined as the quietest sound that the average young man could hear. (who had not had deleterious noise exposure) These surveys were commonly taken by military recruitment centres, fairgrounds and so on. Obviously, one half of the cohort could hear quieter sounds and one half could not hear quite so well.
What is the root word for hear?
hear - hear(s), hear(ing/s), hear(able), hear(er/s), hear(ken), hear(say), hear(se/s/d), hear(ten/s)
In parliament do they say hear hear or here here?
It is Hear Hear (originated from members telling others to 'Hear' what the speaker was saying)
How do you spell the saying 'here here' or is it 'hear hear?
The correct spelling is "hear hear." It is an expression used to show agreement or approval with what someone has said, particularly in a formal setting like a parliament or meeting.
